Curtain roller



F. H. HART CURTAIN ROLLER Apr. 24, 1923.

Filed Sept. 19, 1921 INVENTOR.

BY% jg A TTORNEYS.

Patented Apr. 24, 1923.

UNITED STATES PATENT OFFICE.

FRANKLIN H. HART, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T C. AND COMPANY,OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CURTAIN ROLLER.

Application ,filed September 19, 1921 Serial No. 501,533.

TocZZ w ho'm it may concern;

Be it known that I, FRANKLIN H. HART, a citizen of the United States,residing at New Haven, county of New Haven, State of Connecticut, haveinvented an Improvement in Ourtain Rollers, of which the following is aspecification.

This invention relates to curtain or shade rollers and has for an objectto provide an improved curtain roller in which the pawls will be heldagainst rattling.

It is a further object of the invention to provide a curtain rollerhaving the usual pair of pawls pivoted on the rotating portion of .theroller adapted to coact with a recess in the stationary element to holdthe roller against turning, in which means is provided, operated by theholding pawl, for preventing rattling of the tree pawl.

With these and other objects in view I have devised the structuresdisclosed in the accompanying drawing in which,

F igl 1 is a front elevation of my improved roller showing a curtain orshade in position 25 thereon.

Fig. 2 is an end view of same.

Fig. .3 is a longitudinal sectional view at the pawl end of the rolleron a somewhat enlarged scale.

Fig. 4 is an end view of the form shown in Figs. 1 to .3 also on anenlarged scale.

Fig. 5 is a similar view of a slightly modified form, and

Fig. 6 is a similar view of a still further modified form. o

The roller comprises the usual stationary element 10 and the rotatingelement 11 forming the usual spool on which the curtain 12 is wound. Thestationary element 10 is secured. at its opposite ends in brackets 13which are adapted for attachment at the top or any portion of the windowby suitable screws 14. In the present instance this sta tionary elementis a cylindrical rod fastened 45 by any suitable means such .as a pin 15in recesses in the brackets 13. This rod or a boss on the bracket isprovidedwith a recess 16 which, when the roller is placed in position,is on the top of the stationary element, 50 as shown in the drawing. Therotating shell 11 is closedat its opposite ends by suitable.

discs 17 to one of which discs are pivoted by suitable rivets 18, a pairof pawls 19, so that these pawls are carried about the stationary memberas the shell rotates in winding and unwinding the curtain in the usualmanner. A coiled spring 20 is provided within the roller tending torotate the shell in the direction otthe' arrows to wind up the curtain,Each pawl is provided on its inner side with a projecting lug 21 whichis adapted, when the shell is rotated, to seat in the recess 16 and holdthe shell against turning as is usual in this class of devices. Eachpawl is, however, provided with a curved projection 22 of sufficientlength that i when the lug 21 of one pawl is within the recess 16, theend thereof will press against a short projection 23 on the other orfree pawl on the opposite side of its pivot, and tend'to turn said freepawl about its pivot 18 and hold it against any suitable part of therotating element, such as the flange 24. The, pawls are pivoted on thedisc 17, a sufficient distance from their center of rotation, that thereaction of the holding shoulder 25 of the recess 16 pressing on the lug21 of the pawl tends to rotate the pawl counterclockwise, as viewed inFig. 4. This presses the end of the long projection 22 against the sideof the short projection '23 on the free pawl tending to turn itclockwise, as viewed in Fig. 4, on its pivot 18 and hold it in contactwith the flange 24.' The pawl may be so shaped that the curve of theprojection 22 rests against this flange or there may be provided asecond lug26 to contact with the flange. It will, therefore, be notedthat the pressure of the spring tending to rotatethe shell of the rolleracting through the holding pawl retains the free pawl against rattling.This is particularly desirable in curtain rollers which are to be usedon automobiles.

In 5 I have shown a'slight modification in which the free end .of thecurved projection 22 does not press against the side of the shortprojection on the other pawl but, the side 27 of this projection pressesagainst a short projection 23 on the other pawl tending to turn it aboutits pivot 18 into contact with the flange 24 in the same manner as thatdisclosed in Fig. 4.

In Fig. 6 the short projection 28, corre sponding to short projections23' and 23 in Figs. 4 and 5, is located on theopposite side of the pivot18 and the long curved projection 22 contacts with aside of this lug toturn the free pawl counterclockwise or inwardly toward the stationaryelement and torest thereagainst. The efiect, however, is

the same as in the other two forms, as under the action of the spring 20through the holding pawl the free pawl is pressed against the threepoints of support and prevented from rattling.

It will be noted, from an inspection of the drawing, that the device isvery simple in construction and that there is no change necessary in theroller itself to accomplish the desired result of preventing rattling ofthe loose pawl, the change being in the pawls themselves. It will alsobe apparent that the pawls may be very freely pivoted on their pivots 18so that they are free to turn in the rotation of the element 11, butthat when the lug 21 in one of them is in the recess 16 of thestationary element to prevent turning of the element 11 the free pawl ispositively prevented from rattling.

Having thus set forth the nature of my invention, what I claim is:

1. A curtain roller comprising rotary and stationary elements, meanstending to turn the rotary element, a pair of pawls carried by therotary element, said pawls and stationary element being provided withshoulders adapted to coact to prevent turning of the rotary element inone direction, and means operated by the holding pawl acting on the freepawl to prevent its rattling.

2. A curtain roller comprising stationary and rotary elements, meanstending to rotate the rotary element, a pair of pawlspivoted to therotary element, the pawls and sta tionary element being provided withshoulders adapted to coact to hold the rotary element against turning inone direction, and means carried by the pawls adapted when one pawl isin holding position to engage the other pawl and hold it againstrattling.

3. A curtain roller comprising stationary and rotary elements, meanstending to rotate the rotary element, a pair of pawls plvoted to therotary element, said stationary element being provided with a recess,lugs on the pawls adapted to enter said recess, and means on the pawlsadapted when a pawl is in holding position to retain the other pawlagainst rattling.

4:. A curtain roller comprising stationary and rotary elements, meanstending to rotate the rotary element, a pair of pawls pivoted to thestationary element, said stationary element being provided with arecess, lugs on the pawls adapted to enter the recess to prevent turningof the rotary element in one direction, and a projection on eachpawladapted when a pawl is in holding position to press against the freepawl and hold it against rattling.

5. A curtaln roller comprising stationary and rotary elements, meanstending to rotate the rotary element, a pair of pawls pivoted to therotary element, coacting means on the pawls and stationary element tohold the rotary element against rotation in one direction, and meansoperated, by the rotating means to hold the free pawl against rattling.

6. A curtain roller comprising stationary and rotary elements, meanstending to rotate the rotary element, a pair of pawls pivoted to therotary element, the pawls and stationary element being provided withshoulders adapted to coact to hold the rotary element against turning inone direction, projections on the pawls on opposite sides of theirpivots, the projectionof one pawl when the pawl is in holding positionadapted to contact with the opposite projection of the other pawl andtend to turnit on its pivot.

7. A curtain roller comprising rotary and stationary elements, meanstending to rotate the rotary element in one direction, a plurality ofseparate relatively movable pawls carried by the rotary element andprovided with shoulders, said stationary element being provided with ashoulder adapted to coact with the shoulder on any of the pawls toprevent turning of the element under the action of said means, and meanscarried by each pawl adapted when the pawl is in holding position toengage the acent free pawl and retain the same stationary to preventrattling thereof. I

8. A curtain roller comprising rotary and stationary elements, meanstending to rotate the rotary element in one direction, a pair of pawlspivoted to the rotary element and each provided with a shoulder, saidstationa'ry element being provided with a shoulder adapted to engage theshoulder on either of the pawls to retain the rotary element againstturning in the opposite direction, and a projection carried by each pawladapted when the pawl is in holding position to be pressed against thefree pawl under the action of the turning means to hold the free pawlstationary and prevent rattling thereof.

9. A curtain roller comprising rotary and stationary elements, meanstending to rotate the rotary element in one direction, and a pair ofseparate relatively movable pangs carried by one of said elements, saidpaw s and the other element being provided with coacting means to holdthe rotary element against rotation under the action of said firstmentioned means, each pawl being adapted when in holding position totransfer pressure under action of the element rotating means to theother pawl and hold it against rattling.

In testimony whereof I afiix my signature.

FRANKLIN H. HART.

